Mechanical puzzle



FIG. 1 is a perspective view of a mechanical puzzle showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a bottom plan view of a second embodiment of FIG. 1, the difference residing in the shape of the insert;

FIG. 7 is a bottom plan view of a third embodiment of FIG. 1, the difference residing in the shape of the insert;

FIG. 8 is a perspective view of a fourth embodiment of FIG. 1;

FIG. 9 is a bottom plan view of FIG. 8;

FIG. 10 is a right side elevational view of FIG. 8; and,

FIG. 11 is a left side elevational view of FIG. 8. 

The ornamental design for a mechanical puzzle, as shown and described. 